feat: add metric for ping handler update room failures (#699)

Author: ffelipelimao

internal/adapters/metrics/grpc.go

@@ -38,4 +38,18 @@ var (
 			monitoring.LabelCode,
 		},
 	})
+
+	PingHandlerUpdateRoomFailuresMetric = monitoring.CreateCounterMetric(&monitoring.MetricOpts{
+		Namespace: monitoring.Namespace,
+		Subsystem: monitoring.SubsystemApi,
+		Name:      "ping_handler_update_room_failures",
+		Help:      "Number of failures in UpdateRoomWithPing handler when calling UpdateRoom",
+		Labels: []string{
+			monitoring.LabelScheduler,
+		},
+	})
 )
+
+func ReportPingHandlerUpdateRoomFailure(schedulerName string) {
+	PingHandlerUpdateRoomFailuresMetric.WithLabelValues(schedulerName).Inc()
+}

internal/api/handlers/rooms_handler.go

@@ -25,6 +25,7 @@ package handlers
 import (
 	"context"
 
+	"github.com/topfreegames/maestro/internal/adapters/metrics"
 	"github.com/topfreegames/maestro/internal/api/handlers/requestadapters"
 	"github.com/topfreegames/maestro/internal/core/entities/events"
 	"github.com/topfreegames/maestro/internal/core/logs"
@@ -90,6 +91,7 @@ func (h *RoomsHandler) UpdateRoomWithPing(ctx context.Context, message *api.Upda
 	err = h.roomManager.UpdateRoom(ctx, gameRoom)
 	if err != nil {
 		handlerLogger.Error("error updating room with ping", zap.Any("ping", message), zap.Error(err))
+		metrics.ReportPingHandlerUpdateRoomFailure(message.SchedulerName)
 		return &api.UpdateRoomWithPingResponse{Success: false}, nil
 	}